Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2176
PUT
Eastman Chemical
EMN
$7.8B
| $789K | ﹤0.01% |
107
+79
| +282% | +$5.67K |
|
2177
CALL
KKR & Co
KKR
$89.2B
| $789K | ﹤0.01% |
294
-74
| -20% | -$1.95K |
|
2178
ON Semiconductor
ON
$33.8B
| $789K | ﹤0.01% |
+41,087
| New | +$790K |
|
|
PEGI
2179
PUT
DELISTED
Pattern Energy Group Inc. Class A
PEGI
| $789K | ﹤0.01% |
293
+153
| +109% | +$3.85K |
|
2180
PUT
StoneCo
STNE
$2.62B
| $786K | ﹤0.01% |
226
-167
| -42% | -$5.57K |
|
|
AMRS
2181
PUT
DELISTED
Amyris Inc.
AMRS
| $786K | ﹤0.01% |
1,653
+158
| +11% | +$590 |
|
2182
CALL
Integer Holdings
ITGR
$3.35B
| $785K | ﹤0.01% |
104
+41
| +65% | +$3.25K |
|
2183
CALL
VICI Properties
VICI
$29.4B
| $785K | ﹤0.01% |
347
+73
| +27% | +$1.59K |
|
|
TGI
2184
CALL
DELISTED
Triumph Group
TGI
| $784K | ﹤0.01% |
343
+253
| +281% | +$5.79K |
|
2185
ProShares Ultra Silver
AGQ
$1.16B
| $783K | ﹤0.01% |
+26,573
| New | +$799K |
|
2186
CALL
Raymond James Financial
RJF
$32.5B
| $783K | ﹤0.01% |
143
+36
| +34% | +$1.96K |
|
2187
PUT
Simpson Manufacturing
SSD
$7.98B
| $783K | ﹤0.01% |
113
+2
| +2% | +$130 |
|
2188
PUT
Waters Corp
WAT
$36.8B
| $781K | ﹤0.01% |
35
+5
| +17% | +$1.08K |
|
|
TBCH
2189
CALL
Turtle Beach Corp
TBCH
$239M
| $781K | ﹤0.01% |
670
-2
| -0.3% | -$20 |
|
|
TELL
2190
PUT
DELISTED
Tellurian Inc.
TELL
| $780K | ﹤0.01% |
939
+361
| +62% | +$2.59K |
|
|
CHUY
2191
PUT
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $779K | ﹤0.01% |
315
+161
| +105% | +$3.89K |
|
2192
CALL
Children's Place
PLCE
$53.6M
| $777K | ﹤0.01% |
101
-43
| -30% | -$3.79K |
|
|
TGE
2193
CALL
DELISTED
Tallgrass Energy, LP Class A Shares
TGE
| $777K | ﹤0.01% |
386
-245
| -39% | -$4.74K |
|
2194
PUT
Nice
NICE
$5.29B
| $776K | ﹤0.01% |
54
+47
| +671% | +$7.02K |
|
|
CTLT
2195
PUT
DELISTED
CATALENT, INC.
CTLT
| $776K | ﹤0.01% |
163
-409
| -72% | -$22K |
|
2196
CALL
Insulet
PODD
$11.3B
| $775K | ﹤0.01% |
47
-381
| -89% | -$53.5K |
|
2197
Sinclair Inc
SBGI
$974M
| $775K | ﹤0.01% |
18,151
+8,964
| +98% | +$434K |
|
2198
CALL
Aon
AON
$77.3B
| $774K | ﹤0.01% |
40
-59
| -60% | -$11.4K |
|
2199
iShares MSCI Turkey ETF
TUR
$206M
| $774K | ﹤0.01% |
28,981
-1,245
| -4% | -$31.4K |
|
2200
RH
RH
$3.3B
| $773K | ﹤0.01% |
4,526
+4,476
| +8,952% | +$637K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.